Band tying machine



Feb. 5, 1935. L, M. HARVEY 1,939,669

BAND TVYING MACHINE Filed Fb. 18, 1933 e Sheets-Sheet 1 44 Inventor E E I Feb, 5, 1935. L. M. HARVEY BAND TYING MACHINE Filed Feb. 18, 1933 6 Sheets-Sheet 2 Inventor 1.. M. HA VEY BAND TYING MACHINE Filed Feb. 18, 195:5

Feb. 5, 1935 6 Sheets-Sheet Feb-5, 1935. HARVEY 1,989,669

BAND TYING MACHINE Filed Feb. 18, 1955 6 Shgaets-Sheet 4 fn'ventar zl/tameys Feb. 5, 1935. L, HARVEY 1 1,989,669

BAND TYING MACHINE Filed Feb. 18, 1935 6 S heets-Sheet 5 JJ 43 "i fir 1-] t/orneys Feb. s, 1 35.

L. M. HARVEY BAND TYING MACHINE Filed Feb. 18, 1953 5 Sheets-Shet 6 Patented Feb. 5, 1935 UNITED STATES PATENT OFFIQE BAND TYING MACHINE Leo M. Harvey, Los Angeles, Calif. Application February 18, 1933, Serial No. 657,375 29 Claims. (01. iii-9.1)

This invention reiatesto a machine icrerip= ping, tensioning and tying the tensioned band around boxes, bundles or the like, and it is an object of this invention to provide such a machine which will be simple in design, easy to operate, and practically automatic in performing the diflferent steps of the tensioning and tying operations. Y This invention will be illustrated and described in its preferred embodiment for applying flat bands to boxes, but it is tolbe understood that many of the novel features of the invention are applicable to round wire tying machines, and that with slight modification of the gripping and ty= ing means, the machine may be adapted to apply round wire bands. j

It is an objectrof this invention .to provide a light, portable machine which may be handily moved from one box to another, but if, desired, may be mounted stationary, and the boxes moved to the machine;

A further object is to provide means for tensioning the band to a predetermined tension.

A further object is to provide means which will operate when the band has been tensioned to a predetermined degree for interrupting further tensioning, and which means may be utilized to automatically inaugurate the tying and severing operations.

A further object is to provide an oscillatory operating handle which will be initially free, but which will become operatively connected with the tensioning means when the tying device is moved from an open position to a position setting directly over the band, whereuponby oscillating the handle the tensioning'means will be actuated to pull the band tightly around the article being banded, and for providing means which will actuate as soon as the band has been tensioned to a predetermined degree for automatically connecting the operative handle for operating the tying and severing means.

A further object is to provide a master cam, which, when oscillated will actuate the tensioning means and when rotated through a complete revolution, will actuate the tying and severing means.

A further object is to provide means for connecting the oscillatory operating handle with the master cam, in such a way that upon oscillating the handle, the master cam will be oscillated to actuate the tensioning means and for providing means operative when the tension in the band reaches a predetermined degree for re-connecting the handle with the cam, whereupon for each oscillation of the operating handle the cam. will be rotated in a forward direction until the master cam has completed a full revolution, whereby the master cam during its forward rotation will actuate thetying and severing means.

A further object is to provide a control means for initially retaining the oscillatory operating handle disconnected from the master cam, and which control means may be automatically operated during the movement of the tying means from the open to the set position to connect the handle with the master cam, whereupon by oscillating the operating handle the cam will be oscillated to actuate the tensioning means. And for arranging the control means to automatically operate when the band has been tensioned to a predetermined degree for changing the connection between the handle and cam, whereupon by oscillating the handle the cam will be rotated in p a forward direction for a complete revolution whereby the cam, during its revolution, will actuate the tying and severing means and also the means for returning all of the elements to their initial starting positions.

A further object is to provide a reeiprocatory tensioning means with a resilient member which will actuate when the tension of the band reaches a predetermined degree for interrupting further tensioning of the band.

A further object is to utilize the movement of the resilient means for actuating the control means for inaugurating the tying cycle of the machine.

A further object is to provide the journaled end of the oscillatory operating handle with two independent pinions, a pawl for each pinion and a control means operable for initially retaining both of the pawls out of engagement with their respective pinions, and means for operating the control means to first actuate the tensioning pawl into locking engagement with its respective pinion, whereupon the pinion will be oscillated with the oscillations of the handle, and means for further actuating the control means to change the tensioning pawl from a locking to a ratchet engagement with its respective pinion, and simultaneously therewith, for releasing the second pawl into ratchet engagement with its respective pinion whereby as the handle is oscillated, each of the pinions will be rotated in the opposite directions.

A further object is to operatively connect the first or tensioning pinion with a master cam through a pair of gears mounted upon a countershaft whereby the cam will be rotated in the same direction as that of the tensioning pinion and for directly meshing the second pinion with the master cam whereby the cam will be rotated in a direction reverse to that of the second pinion. Thus, by so connecting the two pinions with the cam, the cam will be continuously rotated in a forwardly direction during the oscillation of the operating handle when the control means releases both of the pawls into ratchet engagement with their respective pinions.

A further object isto provide'the oscillatory operating handle with means for transposing the sliding movement of the control means into a rotary motion for rotating the pawl control shaft,

and for thereby controlling the relation of each of the pawls with its respective pinion.

A further object is to provide 'a tying means with toggle levers of different lengthand connecting the adjacent ends "oi'thetoggle levers with the free ends of jointed toggle links so arranged and proportioned that when the levers arein the open position',*the jointed linkswill fold back upon the shorter "or the levers, and when the levers are actuated to the 'set position, the jointedlinks will-form ato'ggle between the levers. 1 I f I g i A further object is to provideaispringmeans for yielding, urging the tying means into the. open position and-for providing what may wbe te-niied an escapement' lock for releasably locking the tying meansinthe set position. JIhe term escapement lock is deemed appropriate because the -locking member corresponds I in form to the anchormember ofthe common escapem'ent device used in clocks and acts in somewhat the same manner.

A further object is to pro-videsapositioning means for maintaining the: forming or crimping jaws of the tying means in substantial alignment with respect to theband during the tyingoperation. A further object is'to'providethe'mastercam with means for actuatingsaid positioning means. A further object is to providethemaster cam with means for returning the togglelinks after the completion of the tyingoperation to an outof-line position wherefrom the links'may be. folded 'back upon the shorter of the two toggle levers.

A further object is to provide meansifor severing the-band from its supply before or'substantially simultaneously withcthe tyingtof the band. A further object isto provide'the master cam with means for actuating the severing means'in correct'timed re-lationwith respect to. the actuationof the other functions of the machine.

A further object isto provide a severing means operative i for severing the band close to the .tie,

Afurther object'is to provide a first or bandend gripper which will. resist movement of the band away from the tyingrmeans and which first gripper maybe retained-cocked in its retracted position or automatically releaseditherefrom into the gripping position by atrigger. means when the band endis positioned in themachinaand for providing 1 means for automatically re-cocking' the first gripper upon the completion of the tie for releasing-the tied band andfor'rendering the gripper ready for the next band to beinserted.

further object is to provide a second or takeup'gripper positioned-at the side of tying means opposite to the first gripper, and arranged to permit-theband to be pulled toward the tying means but resisting movement of the band away from the tying meansgand to providea gripper actuating means 1 for retaining the take-up gripper to its retracted position whilelthe tying means the same is positioned in the tensioning gripper, and said gripper means being so arranged that upon the outward movement or stroke of the tensioning'means'the gripper will grip and pull the ,band outwardly but upon the in-stroke of the "tensioning'means the gripper will slide over the band, whereby the band will be tensioned in a step-by-step manner.

' Otheri objects and advantages oftheinvention will -become apparent as the nature of the same is m'ore fullyunderstood from the'iollowing description Land accompanying'drawings wherein is setforth whatlisnow considered to be a preferred embodiment. ."It i should .be understood, however, thatthisparticular embodiment of the invention is chosen principally for the purpose of exemplification, and that variations therefrom in details: ofv construction or arrangement of the parts may a;c'c'ordingly be efiected, and. yet remainwithini the spirit and scope'of theinventionasthe sameissetforth in the appended claims. l l

in the drawings: V

Figure 1 illustrates a plan view of the band tying machine as it normally appears'prior'to-the commencement of the banding operation;

Figure 2 illustrates the left side view of the machine;

Figure 3 illustrates a front view of the machine; 1

Figure 4 illustrates 'asectional viewtaken substantially'in the plane of lines IV--IV of Fig. 1;

Figure 5' illustrates a'fragmental sectional view taken substantially in the planeof lines V.-V of Fig. 1;

:Figure '6 illustrates'a fragmental sectional'view of the severing mechanism taken substantially in'thejplane' of lines-VI-VI of Fig. 1;

Figure '7 illustrates a fragmental :plan view showing the action of the resilient member of the tensioning means when'theband has been 'tensioned, to a predetermined degree. for interrupting further tensioning. This View also illustrates the tying-means in the setposition;

Figure'8 illustrates on an enlarged scale, a fragmental. sectional View taken substantially in .theplane of lines VIII-VIII of Fig. 3, and shows the second or take-up gripper and the actuating means therefor;

Figure 9 illustrates on an enlarged scale, a fragmental sectional View taken substantially in theplane'of line IX-IX of and shows the first orband-end gripper, lock, trigger, and automatic cocking means therefor;

'Figure- 10 illustrates a partial plan View of Fig. 9; I

Figure 11 illustrates an enlarged fragmental sectional View taken substantially in the plane of line XI-X[ of Fig. 7;

Figure 12 illustrates on an enlarged scale a fragmentalsectional view taken substantially in the plane of line XII-XII of Fig. 1;

Figure :13 illustrates on an enlarged scale, .a

fragmental view partially in section of the oscillatory operating handle together with the two pawls and two pinions and the controlling means therefor;

Figure 14 illustrates on an enlarged scale a fragmental sectional view taken substantially in the plane of line XIVXIV of Fig. 13, and illustrating the two pawls held in inoperative position by the pawl control shaft;

Figure 15 illustrates a view similar to Fig. 14, with the exception that the control shaft has been rotated to lock the tensioning pawl in operative engagement with its pinion;

Figure 16 illustrates a view similar to Fig. 14, with the exception that the control shaft has been further rotated to change the tensioning pawl from looking to a ratchet engagement with its pinion, and illustrating the second pawl in ratchet engagement with its respective pinion;

Figure 1'7 illustrates an enlarged fragmental sectional view taken substantially in the plane of line XV1IXVII of Fig. 13.

One embodiment of this invention is illustrated in the drawings as disclosing the invention in the form of a portable machine which may be easily moved from one article to be bandedto another. In Figure 2 the machine is illustrated as mounted upon a box 1 to which the band 2 is to be applied. The frame or base 3 of the machine is placed upon the top surface of the box at the location at which the band is to be placed. Preferably the band is supplied from a reel not shown, and is loosely looped around the box.

To assemble the looped band into the machine, the band-end 4, (note Fig. 3), may be positioned in a notch 5, formed in the inner side of the second gripper anvil 6, for correctly locating the band-end with relation to the tying means. After the band-end has been placed in the locating notch, the band may be threaded between the jaws of the tying means and then over the first gripper anvil 7.

As the band is to be tensioned before the tying operation, it is essential for the end 4 of the band to be securely fastened or gripped in the machine to prevent the band from being pulled out of the machine by the tensioning means. Any suitable gripping means may be provided to grip the band end, which gripping means will be referred to as the band-end or first gripper to distinguish this gripper from the other gripping means. As illustrated most clearly in Figures 3, 9 and 10, the

first gripper may include a gripper anvil '7 formed integral or suitably secured to base 3 over which the band is placed, and a gripper member 8 may be cperatively mounted above the anvil by means of the pivot pin 9. The engaging face of the first gripper may be serrated as at 10 and may be provided with a curvature eccentric from the pivot pin 9, whereby any tendency of the band. to be pulled toward the right as viewed in Fig. 3, or away from the tying means, may act to increase the gripping force of the gripper. A spring means 11 may act between the arm 12 and a suitable pin 13 carried by the base to yieldingly urge the gripper into gripping engagement with the band.

However, it is desirable to normally retain the first gripper cooked in an open or retracted position to enable the band to be more expeditiously placed in the machine, and for this purpose a latch member 14 may be pivotally mounted upon the control lever 15 by means of a suitable pivot pin 16 (note Figures 3, 9 and 10), and'provided with a latch notch 17 positioned to engage the arm 12 of the gripper to retain the gripper cocked in the open or retracted position. A spring 18, acting between the latch member and a pin 19 on the control lever, may be provided to yieldingly retain the latch in engagement with the gripper arm.

The operator may place the band in the ma chine more expeditiously, providing it is not necessary to manually open and then close the respective grippers, and therefore, the first or bandend gripper may be provided with means for automatically tripping the cock gripper when the band has been correctly positioned in the machine, which means may include a first gripper trigger 20, pivotally mounted upon the base as at 21, and may be provided with a suitable torsional spring means 22 for resiliently retaining the trigger in its operative position. The first gripper trigger may be provided with an arm 23 extending above the pivot 21, and adapted to engage a trigger notch 24 of the latch member 14. The lower end of the trigger is positioned to be engaged and swung inwardly as the band is moved into tying position. The movement of the trigger acts to rock the latch member 14 until the gripper arm 12 is released from the latch notch 1'1, whereupon spring 11 is free to swing the serrated portion of the gripper into gripping engagement with that portion of the band supported upon the first gripper anvil '7. The gripping anvil '7 of course, is a complementary portion of the gripper means, but for the sake of simplicity, when referring to the gripper means broadly, it is to be understood that the anvil is intended to be included.

--As soon as the band endis securely gripped by the first gripper, the unnecessary slack of the band loop is taken up and the operator threads the section of the band indicated at 25, through the second or take-up gripper, by placing the band between the second gripper anvil 6 and the second or take-up gripper 26. The second gripper may be referred to as the take-up gripper as this gripper is arranged to permit the band to be moved therethrough in a direction to tension the band, but resists or prevents movement of the band in a reverse direction. Any suitable gripping means may be provided, such as the gripper 26 (note Figure 3) pivotally mounted upon the base by means of the pivot pin 27, and a spring 28 may be provided to act between the extended end of the gripper and the base, to yieldingly urge the gripper into gripping engagement with the band supported upon anvil 6. Like the first gripper, it is desirable to. automatically retain the second gripper in an open or retracted position during the placing or" the band in the machine. And therefore, means may be provided for retaining the take-up gripper in an open position until the tensioning operation is ready to be inaugurated, which means may include a control lever 29 (note Fig. 8) pivotally mounted upon the base as at 30, and the gripper may be provided with an arm 31 over-riding the control lever, whereby as the control lever is moved up or down, the second gripper 26 is likewise moved up or down to or from gripping engagement with the band. The control lever in turn may be actuated by a pin 32 carried by the single toggle lever 33 of the tying means, whereby the second gripper is retained in the open or retracted position until the toggle lever 33 is swung to the set position for inaugurating the tensioning and tying operations, whereupon the second or take gripper is released into gripping engagement with the band supported upon the adjacent gripper anvil 6. Like the firstgripper, the take-up gripper may be'provided with an eccentric gripping surface which may be serrated as indicated at 34, and arranged to permit the band to be pulled toward the tying means, but resists a reverse movement of the band.

The band may be next passed through the tying means and over the severing horn 35 to the third tensioning gripping means, which gripping means may include a third gripper member 36, (note Figure 11) pivotally mounted uponthe crosshead 37 by means of the pivot pin 38. A trigger means may be provided for the tension gripping means, which may include a trigger 39' pivotally mounted upon the end of crosshead 37 by the pivot pin 40. The trigger 39 may be provided with a shoulder 41 arranged to engage the notch 42 of the gripper 36, and a single spring means 43 may connect the trigger and the gripper for yielding, urging each into its respective operative position. The trigger may be arranged to be engaged and actuated by the band during the placing of the band in the third gripper, whereby the trigger shoulder' ll will be moved out of engagement with the gripper, whereupon, due to the action of spring 43, the gripper is swung into gripping engagement with the band supported upon the third gripper anvil 44. l

The third or tensioning gripper 36 may be pro- Vided with an ecoentriogrippingsurface serrated as at 36a and arranged to securely grip and pull the hand during the out-stroke of crosshead 3'7, and to slide over the band during the in-stroke of the crosshead, whereby the band will be pulled to take up the slack and to tension the band around the article being banded. The .tensioning gripper may be provided with a handle 45 for re-cocking the gripper to the open position for releasing the band upon the completion of the tying operation, and for holding thegripper out of the way during the placing of the band in the machine. I V The band has now been placed and gripped in the machine and is ready for the commencement of the-tensioning, tying and severing operations. Normally, the tying means are retained in an open or retracted position, as is illustrated in Fig. 2, that is, swung open to facilitate the placing of the band in the machine, and therefore, must be swung to the position as illustrated in Figure 4, which position for convenience, may.

be termed the set position, before the tying operation can be started. The tying means, when moved to the set position, sets directly over and partially encloses the band, and is then ready for the tying operation.

The arrangement for moving the tying means from the open to the set position, may include journaling single toggle lever 33 on a toggle shaft 46 suitably supported upon the base, and providing the single toggle lever 33 with an operating handle 47. A spring 48 may act between the pin 49 positioned on handle 4'7, and the base for. yieldingly retaining the single toggle lever in the open position. By means of handle 47, the single toggle lever may be swung against the: action of spring 48, to move the tying means from the open to the set position, until the tying or crimping jaw 50 carried by lever 33, engages the edge of the band to arrest further movement of lever 33. It is desirable to releasably lock the tying means in the set position, and for this purpose an escapement lock 51 'may be provided. The advantage of utilizing an escapement lock resides in providing a locking means which will only look the tying means in the set position when a band is placed in the machine. The escapement lock 51 is illustrated clearly in Figures 1 and 4, and may include an anchor member 52 suitably joLn-naled in the base as by the pivot pin 53. re anchor member may be provided with two spaced teeth. The upper of the two spaced teeth may be termed the locking and tripping tooth 54, while the second or lower tooth may be termed the re-setting tooth 55, and are positioned in the path described by the rear end of the single toggle lever 33. From Figure 4 it will be observed that the locking and tripping tooth 54 is in lockingengagement with the looking notch 56 positioned in the end of the toggle lever 33. In this arrangement of the parts the locking tooth 54 acts to lock the lever 33 and thereby the tying means in the set position.

The rear edge of the anchor member 52 may be provided with two notches 57 and 58, into either one of which the round nosed pawl 59 is urged by means of spring 60. As will be observed from Figure 4, the round nosed pawl 59 is in engagement with notch '7 when the looking tooth 54 engages the lever notch 56, and should the lever 33 be swung slightly higher, the

anchor member 54 will be rotated until the round nosed pawl snaps out of notch 5'7 into notch 58, thus rotating and locking the anchor member in the position indicated in broken lines, whereupon, should'the lever 33 be released, the lever notch 56 will notengage the locking tooth 54, and therefore,-due to the action of spring 48, will return the tying means to the open position.

During the return movement of the lever 33, the resetting tooth 55 which had previously been svnmg into the broken line position of Figure 4, in which position the end of the tooth projects into the circular notch 61 formed in the end of lever 33, will be engaged by the tooth 62 formed between the upper end of the circular notch 61 and the rear end of notch 56 to rotate the anchor member until the round nosed pawl 59 rides out of notch 58 and back into the first notch 57. Thus the anchor member will be reset in its looking position. However, as the lever notch 56 will have previously passed beyond reach of the locking tooth 54, the lever 33 may return to its open position. It may now be appreciated that when thelever 33 is swung to move the tying means from the open to the set position, when a band is in the machine, that the lever 33 will be stopped by the engagement of the tying die 50 with'the edge of the band, and that when so i stopped, that the lever notch 56 will have traveled only sufiiciently beyond the end of the locking tooth 54 to insure a reliable locking action. But should the lever 33 be swung when no band is in the machine to limit the swinging ment lock 52. The movement of the tying means, in swinging from the open to the set position may be made use of by a suitable control mechanism for connecting the operating means of the machine so asto actuatethe tensioning device. The

control mechanism may include a control lever 15 pivotally supported on the base by means of the pivot pin 63 and acted upon by the spring 64 acting between the control lever as at 65 and the base at 66. The forward end of the control lever 15 maybe cam-shaped as at 6'7, and positioned to be engaged and actuated by the forward end of the single toggle lever 33 during the movement of the tying means when returning from the set position to the open position. In other words, when the tying means return to the open position, the forward end of lever 33 engages andactuates control lever 15 to shift the operating or driving mechanism of the machine into a neutral position. Intermediate the control lever pivot 63 and the rear end thereof, the control lever is operatively connected to a'sleeve 68 by means of the pivot pin 69. The sleeve 68 may be slidably mounted upon a shaft '70 suitably mounted upon the base. When the tying means is swung from the open to the set position, the cam surface 6'7 of the control lever is released, whereupon, the spring 64 acts to rock the control lever 15 and thereby slide the sleeve 68 from the position illustrated in Figures 1, 3 and 13, to the position indicated in broken lines in Figure 13. The sliding of the sleeve from the position illustrated in full lines to the position indicated in broken lines in Figure 13, shifts the driving means from a neutral to a driving connection with the tensioning means. 7 The driving means may include an oscillatory operating handle '71 having grip handle '72 at the free end thereof, and a double bifurcation at its operative end, including the legs '73, 7e and '75, each leg of which is suitably journaled upon shaft '70. Intermediate of legs '73 and '74 are pivotally mounted the two pawls '76 and '77 upon a pivot shaft '78. The pawl '76 may be termed the tensioning pawl and may be brought into operative engagement with a tensioning pinion '79, while the pawl 77 may be termed the tying pawl and may be brought into engagement with a tying pinion 80. The pinions '79 and 80 may be journaled upon shaft '70 intermediate the legs '73 and '74 of the oscillatory handle. The two pawls are actuated bythe control means whereby prior to swinging the tying means into the set position, the pawls are retained out of engagement with their respective pinions. While so retained, the handle '71 may be oscillated back and forth without rotating either of the pinions.

By the actuation of the control means during the swinging of the tying means from the open to the set position, the tensioning pawl '76 is shifted into locking engagement with the tensioning pinion 79. The mechanism for controlling the pawls may include a bracket 81 formed upon the leg '75 of the oscillatory handle to which bracket a bell crank lever 82 may be pivoted by means of the pivot pin 33, and the bell crank lever may be provided with a depending arm 84 adapted to travel in the semiannular groove 85 of sleeve 68. The bell crank lever 82 may also be provided with an upwardly extending arm 86 having a circular knob 87 adapted to operate in the bore 88 of the link 89. A pawl control shaft 90 may be journaled in the legs of the operating handle. A bifurcated crank 91 may be suitably mounted upon the pawl control shaft 90 intermediate legs '74 and 75 of the operating handle. The end of link 89 opposite to that having the bore 88, may

By this arrangement the slid the pawl control shaft 90. The control shaft 90 controls the action of the tensioning pawl '76 by means of a transverse V shaped cam groove 93 and a substantially diametrically opposed transverse, semicircular cam groove 9 1. The upper end of the tensioning pawl may be provided with an arcuate finger 95 adapted to ride in or out of the V shaped cam groove 93, and a second arcuate finger 96 adapted to ride in or out of the semicircular cam groove 94. With the control shaft 90 rotated to the position illustrated in Figure 14, which position is the normal inoperative position of the shaft, it will be noted that finger 95 has ridden into the V groove while the finger 96 is riding upon the periphery of the control shaft 90 just adjacent the entrance to the circular cam 94. In this position of the control shaft, by means of the fingers 95 and 96, the tensioning pawl '76 is maintained out of engagement with the tensioning pinion '79, and therefore, the handle '71 may be oscillated back and forth without rotating pinion '79 illustrated in this figure in broken lines. This is the position the parts will assume when the tying means is in the open position. When the tying means is swung from the open to the set position, the control mechanism is actuated to rotate the control shaft 90 from the position of Figure 14 to that of Figure 15. In Figure 15, it may be observed that the control shaft 90 has rotated until the arcuate finger 95 has ridden out of the V groove on to the periphery of shaft 90 while the finger 96 has ridden into the semicircular groove 94, and by this arrangement it may be observed that the tensioning pawl '76 is locked in mesh with the tensioning pinion '79, indicated in broken lines, whereby upon oscillating the handle 71 the tensioning pinion '79 will also be oscillated. In this way the control means acts to operatively connect the oscillatory handle to inaugurate the tensioning cycle for tensioning the band around the article to be tied.

The tensioning means and drive therefore may include a master cam 97 suitably journaled on the base and provided with spur gear 98 which spur gear may be in operative engagement with the tensioning pinion '79 by means of a pair of back gears 99. (Note Figure 4.) The back gears 99 may include a large driven pinion 100 in constant mesh with the tensioning pinion '79, and suitably journaled upon a back gear shaft 101. A small driver pinion 102 may be likewise journaled upon the back gear shaft 101 and suitably connected to the large pinion 100 to be rotated thereby. The small driver pinion 102 may be in constant mesh with the master cam spur gear 98, whereby when the tensioning pawl is locked in mesh with the tensioning pinion 79, as illustrated in Figure 15, and the handle '71 oscillated, the master cam will be oscillated through the driving connection formed by the tensioning pinion, back gears and master cam spur gear. As may be observed from Figure '7, the right hand face of the master cam 97 may be provided with a tensioning cam 103 having a depression or valley as indicated at 104 from which the cam surface rises to a maximum height at 105 and may gradually recede therefrom until just before the cam surface drops off into the valley 104. A tensioning arm 106 may pivot about a pivot pin 107 and adjacent the tensioning cam 103, may be provided with a bifurcated bracket 108, between the bifurcations of which may be suitably journaled the cam roller 109 as by means of pin 110. The cam roller 109 may be positioned to engage the cam surface of the tensioning cam 103 and when the machine is in its initial inoperative position the cam roller 109 may rest in the valley 104. When the tensioning pawl 76 is actuated into locking mesh with the tensioning pinion and the handle 71 oscillated, the master cam97 will be correspondingly oscillated, causing in turn the tensioning cam 103 to oscillate and as the cam roller 109 normally rests in the trough of the valley 104, the rotation of cam 103 in either direction will cause the cam roller to ascend the sides of the valley 104, thus as the tensioning cam is oscillated back and forth, the cam roller 109 will move in and out, causing the tensioning arm to swing back and forth. A spring 111 may act between the pin 112 carried by the tenmounted upon the crosshead guide 116 suitably mounted on the base. As the tensioning, arm 106 is swung back and forth, the crosshead is caused to reciprocatealong the guide 116. As the crosshead carries the third or tensioning gripper, upon each out stroke of the third crosshead 37, the third gripper will. grip and pull in a portion of the slack band while upon the instroke the third gripper will release and slide over the band. As soon as the third gripper releases the band, the second or take-up gripper grips and holds the band, again slipping back to release the tension in the band. Thus, by oscillating the operating handle 71, the crosshead 37 is caused to reciprocate, and upon each reciprocation taking up a portion of the slack in the band until the band has been tensioned to a predetermined degree, whereupon the tensioning means may be arranged to automatically act to interrupt or stop further tensioning of the band. The means, for interrupting the tensioning operation when the band has been tensioned to a predetermined degree, may follow the teaching in my- Patent No. 1,789,900, issued tome on January 20, 1931.

The means for. interrupting the tensioning operation, may include means for yieldably mounting ,the pivot 107 of the tensioning arm 10b,

' whereby when the resistance of the pull of. the

band reaches a predetermined value, then the I pivot 107'may yield rather than to further reciprocate the tensioning crosshead 37. And means may be provided for retaining pivot 107 in a fixed position until the resistance of the pull on the band becomes a predeternined value, whereupon the yielding means may act to snap to the open position, to definitely interrupt the tensioning operation.

As illustrated in Figures 1, 2 and 7, the means for interrupting the tensioning operation when the band has been tensioned to a predetermined degree, may include a trip segment 117 which, together with the spring 118 may form the resilientmember for the tensioning arm pivot 107 to which the trip segment 117 may be operatively connected by means of the link 119. The trip segment may be pivotally mounted upon the base by means of pin 120, and the link 119 may be pivotally connected thereto by means of the pin 121. It may be well tov observe that the center line indicated at 122 in Figure 1, passing through the centers of the pivotpins 121 and 107', passes to the rear of the center of rotation of the trip segment, whereby the thrust during the tension ing operation will endeavor to rotate the trip segment 117 in a clockwise direction as viewed in Figure 1. To resist the rotation of the tripping segment until the tension of the band reaches a predetermined value, the segment may be provided with a concentric cam surface 123, (note Figure '7) having adjacent the pivot 121 a deep notch 124 into which a roller 125 normally seats. The roller 125 maybe rotatably mounted between a pair of trigger links 126, .by means of the pin 126 while in turn the trigger links may straddle and be pivoted to trigger carrier 127, which trigger carrierv may be pivotally mounted upon the tripping segment bearing pin 120. A torsional spring 128 may be provided to yieldingly urge the roller 125 into the deep notch 123. When the roller 125 is seated. in notch124, it will require a force ofconsiolerable magnitude at the tensioning arm pivot 107 to cause the tripping segment to rotate to roll the roller out of the notch, but when such a force is developed by the tensioning means, the trip segmerit will act with a snap action, lifting the roller onto the concentric cam surface 123 from then on, but a relatively small force is required to rotate the trip segment the amount necessary to permit the tensioning armpivot to move while the crosshead 37 remains stationary. -In other words, after'the resilient means snap open, the tensioning arm 106'wi1l pivot about pin 115 as a center,.instead of around the pivot pin 107. It is desirable to provide means for adjusting the point of release of the tensioning means whereby the degree of tension may be adjusted, for which purpose the trigger carrier 127 may be connected to an anchor screw 129 having a thumb piece 130 for ease of adjustment. The anchor screw may be screw-threaded through lug 131 formed on the base. The force required to snap the roller 125 out of the notch 124 will be constant for all positions of the trip segment. However, by actuating the anchor screw 129, the center line 122 will approach or recede from the center of rotation of the trip segment. Of course, should the center line 122 be shifted until it coincided with the pivotal center of the trip'segmenigthen the force acting to rotate the trip segment would be ineifective, and the resilient means would fail to function. But as the center-line moves further and further from the center of rotation of the trip segment, less and less force will be required to snap the resilient means into the open position. The position of the center line 122 with relation to the center of rotation of the trip seg ment is changed by actuating the anchor screw 129 which, in turn, swings the trigger carrier 127, and thereby the trigger links 126, and through the engagement of the roller 125 with the notch, will act to swing or rotate the trip segment 117. As the trip segment rotates, the pivot/pin 121 shifts with relation to the pivot 120, and thereby shifts the centerline'122 toward or away from the center of rotation of the trip segment, whereby the degree of tension to which the band is to be pulled, may be nicely adjusted.

Upon the completion of the tensioning operation, it is desirable to automatically stop further action of the tensioning means, and to inaugurate the tying operation. For this purpose the control means may again be brought into action. The motion of the roller 125 during snap action of theresilient means, maybe utilized to actuate the control mechanism to stop further tensioningaction and to inaugurate the tying operation.

For this purpose the link 132 may be pivotally mounted at one end upon the roller pin 126 The link 132 may be provided adjacent its other end with a slot 133 for operative connection with the extended end 134 of the control lever 15, by means of the screw 135. (Note Figure 12.) The slot 133 is provided in link 132 so as not to interfere with the movement of the control lever when the tying means is swung from the open to the set position. By so connecting the roller to the control lever 15, the control lever will be actuated when the roller 125 snaps out of notch 124, to return the control lever substantially one-half the distance it was moved during the swinging of the tying means from the open to the set position. By the partial return movement, the control lever 15 acts to slide sleeve 68, which, by the means previously described, acts to rotate the pawl control shaft 90, to the position illustrated in Figure 16, wherein it'may be observed that the finger 95 of the tensioning pawl 76, has been returned into the V shaped cam groove 93, while the finger 96 has not entirely ridden out of the semicircular cam groove 94. With the parts so arranged, the tensioning pawl 76 may rock a limited amount upon its supporting shaft 78. A flat spring 136 carried by the oscillatory handle 71, may act to yielding urge the pawl into engagement with the tensioning pinion 79 illustrated in this figure in broken lines. The tensioning pawl is arranged whereby when the handle 71 is swung in a counter-clockwise direction, as illustrated in Figure 16, the pawlwill engage one of the teeth of the tensioning pinion and thus rotate the pinion in a counter-clockwise direction, but when the handle 71 is swung in a clockwise direction as viewed in this figure, the pawl will ride over the pinion teeth and will not effect rotation thereof. In other words, when the pawl control shaft 90 is rotated to the position illustrated in Figure 16, the tensioning pawl is released from its locking engagement with the tensioning pinion, and is shifted into a ratchet engagement therewith. Turning to Figure 4, it will be observed that, (attention is here directed to the fact that Figure 4 is taken looking at the parts in a direction opposite to that of Figure 16, so that the direction of rotation will be reversed) when the handle 71 is swung in a clockwise direction that the pawl 76 will act to rotate the pinion 79 in a clockwise direction, but as the rotation of the tensioning pinion 79 is transmitted through the back gears 99 to the spur gear 98, it will be observed that the spur gear, and thus the master cam, will also be rotated in a clockwise direction as indicated by the arrow 137 By swinging the handle 71 in a counter-clockwise direction, the pawl 76 will merely ratchet over the teeth of pinion 79.

The tying operation is accomplished by rotating the master cam through a complete revolution. The tensioning pawl and pinion may be utilized for this purpose, but lost motion would result as during the swing of the handle in the counter-clockwise direction as viewed in Figure 4, the master cam would remain idle. Therefore, a second pinion 30 which has been previously referred to as the tying pinion, may be provided. And a tying pawl 77 may be provided to engage and drive the tying pinion 80 during the back swing, or swing of the handle '71 in a counterclockwise direction as viewed in Figure 4, but which pawl will ratchet or ride over the teeth of the tying pinion during the forward movement, or

swing of the handle in a clockwise direction. The tying pawl 77 may be provided with a finger 137 which is positioned so as to ride upon the periphery of the pawl control shaft 90 at all times, to hold the tying pawl inactive excepting when the pawl control shaft is rotated to the position illustrated in Figure 16, whereupon the finger 137 will ride into the V shaped cam notch 93 to release the tying pawl 77 into operative ratchet engagement with the tying pinion 80. A fiat spring 138 may be provided to yielding urge the tying pawl 77 into ratchet engagement with the tying pinion 80. The tying pinion 80 directly meshes with the spur gear 98 (note Figure 5). And the tying pinion is rotated in a counterclockwise direction as viewed in Figure 5, during the back swing of the operating handle 71, and thus acts to rotate the spur pinion 98 of the master cam in a clockwise direction, during which time the tensioning pinion 79 is not being driven by the tensioning pawl 76.

Due to the above arrangement of the parts, by oscillating of the operating handle 71, the master cam 97 will be rotated in a clockwise direction, as viewed in Figure 4, for each swing of the handle, thus increasing the operating efiiciency of the machine.

The tying cycle has now been inaugurated and may be carried through to completion by continuing the oscillating of the operating handle 71.

The tying means may be generally of the type disclosed in my copending application, Serial No. 241,037, filed December 19, 1927, and Patent No. 1,897,650, issued February 14, 1933, while the form of the tie may be the same as that disclosed in my Patent No. 1,677,522, issued to me July 17, 1923.

The tying may include a bifurcated toggle lever 139 journaled upon the toggle shaft 46 and a single toggle lever 33 journaled upon the toggle shaft 46 between the bifurcated portion of the toggle lever 139. A pair of first toggle links 140 may be suitably journaled between the bifurcated portion of toggle lever 139 by means of shaft 141. while a second pair of toggle links 142 may be journaled upon opposite sides of the single toggle lever by means of shaft 143. A toggle pin 144 may be provided for operatively connecting the free ends of the first and second pairs of toggle links, and a toggle cam roller 145 may be journaled upon the toggle pin 144 between the links. It may be well to observe in Figures 2 and 4, that the single toggle lever 33 is shorter than the bifurcated toggle lever 139. This arrangement of one toggle lever being longer than the other, is one of the features of this invention, as it is this arrangement which permits the free ends of the toggle links carrying the cam roller to fold back upon the single toggle lever 30, thus permitting the tying or crimping jaw 50, suitably carried by the single toggle lever 33, to be swung a material distance from the tying or crimping jaw 146 carried by the bifurcated toggle lever 139, in order that the band may be easily threaded into the machine, this being the open position of the tying means. (Note especially Figure 2.) The toggle links perform no special function during the swinging of the tying means to or from the open position, but after the tying means have been swung into the set position illustrated in Figure 4, the toggle links are then set to form a toggle between the rear ends of the toggle levers 33 and 139. Also note in Figure 4 that the tying jaws have been moved into engagement with the overlapping band ends and are set or. ready for the tying'or'crimping operation to start; a

The tying means may beactuated by the tying earn 147 which may be formed integrally with the master cam 97, which, as the master cam is rotated, responsive to the oscillation of the operating handle '71, engages the cam roller 1 15, and due to its eccentricity, gradually forces the toggle roller 145 to the right as viewed in Figure 4, to actuate the toggle formed by the toggle levers 33, 139 and the toggle links 140 and 142, thus forcing the tying jaws to close upon the enmeshed band with great force, to securelylcrimp orgtie the overlapped ends of the band. To in sure that the band ends will be securely tied} each of the tying jaws 50- and'l ifi may be provided with a plurality of teeth 148 which may ee received in corresponding slots 149 formed in the opposite die. (Note Figure 3.) The action, of the jaws is to form the band in airoll having'a plurality of shoulders formed throughout the length of the roll. As this form tie and tying means are fully illustrated and described in my co-pending applications above referred to, it is not deemed necessary to describe the details of the tie ortying jaws further. When thelband has been securely rolled and crimped, the toggle roller rolls ofi the high point of the tying earn into the low point or valley 150 thereof, thus terminating further tying action. it

During the tying operation it may be desirable to retain the tying jaws in alignment with the band. In other words, as the toggle forces the tying jaws closed; one or the other of the jaws may move while the opposite jaw may remain stationary, thus the tie would not be formed central of the band. Means may be provided for retaining the jaws in correct position or alignment with'the band, which means may include a positioning cam 151 suitably mounted upon, or formed integral with the master cam, and a positioning bell crank lever 152 journaled upon the base by means of the shaft 153. The arm 154 of the bell crank lever 152, may carry an antifrictie'n cam rpller 155 positioned to ride upon the periphery of the positioning cam, while the other ram 156 may extend forwardly, and support the rear end of the bifurcated toggle lever 139, by means of the projection 157 thereof. At the start of the tying operation, the roller 155 may rolkupon the high point 158 of the positioning cam 151, and as the positioning cam rotatearluring the tying'opera-, tion, the cam stu'face. thereof presented-to the positioning roller may gradually 'recede from the high point 158. The amount of the recession given to the cam' surface of the positioning cam, may be such asto at all'times'during the tying operation, equal substantially one-half the amount of movement given to the tying means by the tying earn 147 and toggle arrangement.

Thereby; during the tying operation, each of the tying jaws will be moved substantially an equal amountfthus retaining the tying means in alignment with the band, and insuring theiormation of the tie in accurate alignment with the band As may be observed from Figure 4, as the cam roller 1E5 travels over the receding portion of;

the positioning cam 151, the bell crank le 'ver 152, will rotate in a clockwise direction, whereby the amount, while substantially simultaneously therewith, the single toggle lever 33 will be moved upaction of the toggle'means being acted upon by the tying cam. I

It is desirable to release the escapement lock 51 during the tying operation, whereby upon completion of the tie, the tying means may be automatically returned to the open position. The releasing of the escapement lock- 51 may take place automatically during the rising 'of the single togglelever 33, whereby the locking and tripping tooth 54 of the anchor member 52 may be engaged and rotated, in a counter-clockwise directionas viewed in Figure 4, by the tooth 62 of the toggle lever 33. As soon as the "anchor member 52 has been rotated sufijciently for the round nosed pawl 59 to ride out notch 57, the pawl-will snapinto the second notch 58, thereby resilientlylocking the anchor: member in the releasing, position as indicated in Figure 4 in broken lines. The escapement lock may be automatically returned to the locking position after i the toggle lever 33 haspassed' out of range of the locking tooth 54, as has already been described. a

During the tying operation the toggle links 140 and 142 may be swung by the tying cam 14? into substantially a straight line position, and in such position may act as a toggle lock to prevent the tying means from opening uponlthe completion of the tying operation. 1 It may therefore be desirable to provide means operative upon the completion of the tying operation, for automaticaliy swinging the toggle links to break any such locking effect, and for this purpose each of *the toggle links 140 may be provided with a 'bracket159, and to provide the tying cam with fa kick back pin 160, which pin will engage the jorackets 159 upon the completion of the tying operation. The brackets may be so located that when the toggle links are in substantial alignment, they will project across the path traversed by the kick-back pins 160, whereupon after the completion of the tying operation and during the final rotation of the master cafn, the kick-back pins will engage the brackets, thereby swinging the toggle links into the position illustrated in 'Figure. It may be observed in Figure 4 that the kick-back pin is carried slightly beyond the 'end of the brackets 159 when the master cam arrives at the end of its 'operating cycle, thus the toggle links are free to be swung to the foldedback position as illustrated in Figure 2, during the 'movement of the tying means to the open position 'underthe influence of spring 48.

It is desirable to provide means for severing the tied band from the band supply, which means; (note Figure 6) may include a'shearing blade E61 pivotally mounted upon the base means f of a pivot screw 162 and positioned to cooperate with the severing horn 35. In Figure 6, the severed end of the band supply is indicated'} at 163; Means may bepr-ovided for ac= tuating the shearing blade in timed relation with the tying operation. The severing oi the band may take place at any time after the tying means have acted to tie the band sufficiently to prevent the band from slipping, due to the tension thereon. For this purpose a severing cam 164 may be mounted upon or formed integral with the master cam 98; The'tying cam maybe provided with two concentric cam surfacea'as, fonexample, the inner or inactive. cam surface 165; and the outer or active'cam surface 156, and these two wardly substantially an equal 'aniount due to the cam. surfaces may be donnected with the abrupt cam surfaces 167. Uni ing the tensioning operation and the beginning of the tying operation, the inactive portion of the severing cam 165 may travel past the cam end 168 of the bell crank lever 169. But before the tying jaws start to tie the band, the abrupt surface 167 of the cam may engage and actuate the cam end 168 of the bell crank lever downwardly, which motion may be transmitted through the bell crank lever, to actuate the shearing blade 161 by means of the arm 1'70 carrying at its outer end a driving pin 171, adapted to operatively engage the notch 172 located in the rear end of the shearing blade. Thus, the shearing blade is actuated to sweep across the severing horn and to thereby sever the band from the supply. As the master cam approaches the end of its operating cycle, the active cam surface 166 travels beyond the cam end 168 of the bell crank lever, whereupon, due to the action of the compression spring 173, acting between the pin 174 of the base and the pin 175 or" the lever 168, the cam lever 168 will ride down the other of the abrupt surfaces 167 and thereby return the shearing blade to its open or retracted position, as illustrated in Figure 6. Upon completion of the tying operation, it is desirable to actuate the'control means to return the tensioning and tying pawls 76 and 7'7 to their inoperative positions, as illustrated in Figure 14 to thereby disengage the oscillatory operating handle from driving engagement with either of the pinions '79 or 80. And for this purpose the control lever 15 may be provided with the cam surface 67 positioned to be engaged by the single toggle lever 33 during its return movement to the open position. The shifting of the control lever 15 rotates the pawl control shaft 90 to lift the pawls into their inoperative position as has been previously described. The shifting of the control lever 15, by the single toggle lever during its movement to the open position, may be utilized vfor cocking the first or band-end gripper 8. For this purpose, the latch member 14 may be pivotally mounted upon the control lever 15 (Fig. 10), whereby the latch notch 17 of the latch member 14, from which the arm 12 of the gripper was previously released by the trigger 20, may be moved back suniciently for the latch notch to again drop in back of the gripper arm 12, so that upon the next forward movement of the control lever 15, caused by the tying means moving to open position, the latch member 14 will act to return the gripper to its open or cocked position, and thereby releasing the tied band and retain ing the gripper cocked in readiness to be released to grip the end of the next band to be tied.

Also the second or take-up gripper 26 may be automatically actuated to release the tied band and to remain open until the inauguration of the next tensioning operation. For this purpose the pin 32, (note Figures 3 and 8) carried by the single toggle lever 33, will engage the second gripper control lever 29, when the toggle lever is swung to the open position, to lift the second gripper into its open position, and thereby releasing the tied band. The control lever 29 will act to retain the second gripper in its open position until the toggle lever 33 is again swung to the set position to inaugurate the tensioning operation. It will therefore be observed that means are provided for automatically releasing the tied band so that the machine may be easily and readily moved clear of the band. Upon the completion of the tying operation, the tensioning cam roller 109 will again drop into the valley or depression 104 of the tensioning cam 103, whereupon, due to the action of spring 111 and the tripping segment spring ll8, the tensioning arm 106 and the tripping segment 117 will be automatically returned to their initial starting position, whereupon the roller 125 will drop into the notch 124 of the trip segment.

As all of the elements have been returned to their initial starting positions, the machine is now ready for the tying operation.

The operation of the machine may be summed up briefly as follows:

The machine may be placed upon the article to be banded at the location at which the band is to be placed about the article. A band, preferably supplied from a reel, may be loosely looped around the article and the loop threaded into the machine by first placing the initial or free end 4 of the band into the notch 5 formed in the inner side of the second gripper anvil 6, then threading the band between the tying jaws and then over the first gripper anvil '7.

As the band end is placed over the first gripper anvil, the inner edge of the band will automatically trip the first gripper by engaging trigger thereof, as has been previously described,thus securely gripping the initial end of the band in the machine.

As soon as the initial end of the band has been securely gripped by the first gripper, the unnecessary slack of the band loop may be taken up and the second lap of the band threaded into the second gripper and again between the tying means and over the severing horn 35 to the third or tensioning gripper, and securely gripped therein as soon as the inner edge of the band engages the gripper trigger 39 thereof.

After the band has been positioned and gripped in the machine, the next operation will be to swing the tying means from the open to the set position and to be there locked by the escapement lock 51. The movement of the tying means to the set position will actuate the control means, as previously described, to operatively connect the operating handle 71 with the spur gear 98, whereupon the handle '71 may be rocked back and forth, which in turn will rock or oscillate the tensioning cam 103 for reciprocating the tensioning means to take up the slack band and tension the band to a predetermined degree. It may take one or a number of oscillations of the lever 71 to tension the band, but as soon as the band will have been tensioned to a predetermined degree, the means for interrupting the tensioning operation will automatically function to shift the control means to release the tensioning pawl 76 and simultaneously therewith release the tying pawl '77, whereby the spur gear 98 will be rotated in a continuously forward direction until this spur gear will have completed one revolution from its starting position. During the forward rotation of the master cam by the spur gear 98 the tying cam 147 will engage the cam roller 145 of the tying means and, due to its eccentricity, will gradually force the tying jaws together to form a secure tie in the overlapping ends of the band located between the first and second grippers. When the band has been securely tied, the roller 145 will ride off the high point of the cam, thus terminating further tying action.

During the tying operation, the tying jaws are maintained in alignment with the band by the positioning means previously described, and also the escapement lock 51 will be disengaged therefrom. Upon the completion of the tying operation, the kick-back pins 160 will engage the brackets 159 of the toggle links of the tying means to thereby swing these links to open the tyingjaws, and thus release the band from the tying means.

The band cutting or severing means may be actuated at any time after the tying means have acted to tie the band sufiiciently to prevent the band from slipping, due to the tension thereon. For this purpose, the severing cam 164 may be mounted upon the master cam and so related thereto as to actuate the severing means after the tying means have acted to secure the tie.

' Upon the completion of the tying operation, the control means will act to return the tension ing and tying pawls 76 and 7? to disengage the 0s cillatory operating handle 71 from driving enga'gement with the machine, and for this purpose the control lever 15 may be actuated by the tying means during the swinging thereof to their open position. Also, this swinging action of the tying means is utilized to cook the first and second grippers so as to release the tied band, whereupon the machine may be moved to its next tying position.

Upon the completion of the tying operation, the tension cam roller 109 will again drop into the valley 104 or" the'tensioning cam 103, whereupon due to the action of spring 111 and the tripping segment 117, the tensioning arm 106 and the tripping segment 117 will be automatically returned to their initial starting positions, whereupon the roller 125 will drop into the notch 12% of the trip segment.

As all of the elem'en s: have been returned to their initial starting positions, the machine will be ready for the next tying operation.

Fromthe foregoing it will be appreciated that the invention is relatively simple, compact and Very efficient for performing the many operations necessary for successfully tying a tensioned band around an article, and that the invention contains many novel parts and combinations of parts organized in cooperative relationship for rendering a machine which may be operated with ease and dispatch and requiring the minimum of attention on the part of the operator.

It is to be understood that the embodiment of the invention illustrated and described herein, is only one of the many embodiments this invention may take, and I do not wish to be limited in the practice of the invention, nor in the claims to the particular embodiment set forth.

I claim:

1. In a band tying machine a reciprocatory tensioning means, band gripping means operable for maintaining the band under tension, a band tying means, an operating handle initially operative for actuating the reciprocatory tensioning means, and means operative when the band reaches a predetermined tension for interrupting the tensiom'ng operation and for cormecting the operating handle with the tying means so that upon further actuation of the operating handle the tying means will be actuated for tying the band.-

2. In a band tying machine a reciprocatory tensioning means, band gripping means operable for maintaining the band under tension, a band tying means, a band severing means, an operating handle initially operative for actuating the reciprccatory tensioning means, and means operative when the band reaches a predetermined tension for interrupting the tensioning operation and for connecting the operating handle with the tying and severing means so that upon further actuation of the operating handle the tying and serving means will be actuated for tying and severing the band.

3. In a band tying machine a reciprocatory' the tensioning means and for connecting the operating handle with the tying means so that upon further actuation of theoperating handle the tying means Will be actuated for tying the band, and means automatically operable upon the completion of the tying operation for releasing the band from the gripping means.

4. In a band tying machine a tensioning means, band gripping means operable ior maintaining the band under tension, a band tying means yieldably retained in the open position, an operating handle freely journaled in the machine, and a control means actuated by the movement of the tying means to the set position for operatively connecting the handle with the tensioning means and further operative when the band has been tensioned to a predetermined degree for disrupting the tensioning means and ior'co-nnesting the handle With the tying means so that upon further actuation of the operating handle the tying means will be actuated for tying the hand.

5. In a band tying machine a tensioning means, band gripping means operable for maintaining the band under tension, a band tying means yieldably retained in the open position, means for moving the band tying means into the set position, a locking means operative for locking the band tying means in the set'position, an operating handle freely journaled in the machine, and a control means actuated by the movement of the tying means to the set position for operatively connecting the handle with the tensioning means and further operative when the band has been tensioned to a predetermined degree for disrupting the tensioning means and for connecting the handle with the tying means so that upon continued operation of the handle the tying means will be actuated for tying the band.

6. In a band tying machine an operating handle, a tensioning means, hand tying means, gripping means including a band-end gripper, a spring for said band-end gripper'ior urging said gripper into gripping position, a releasable 1ocking means for retaining said gripper in the retracted position, a trigger operative for releasing the gripper locking means, a control means operative when the band reaches a predetermined tension ior interrupting the tensioning means and for connecting the operating handle with the tying means, and said control means being operative upon the completion of the tying operation for returning the band-end gripper to be again locked in the retracted position.

7. In a banding machine an operating handle, a tensioning means, band tying means, gripping means including a band-end, gripper, a spring dle with the'tying means, and said control means being operative when the band is tied for returning the band-end gripper to be again locked in the retracted position.

8. In a band tying machine a reciprocatory tension means, a tensioning gripper carried by said means, a spring means for urging said gripper into gripping position, a releasable locking means for retaining said gripper in the retracted position, a trigger positioned to be actuated by the band for releasing said gripper locking means, and said gripper arranged to grip and pull the band during the outward movement of the reciprocating tensioning means and to slide over the band during the inward movement thereof.

9. In a band tying machine a reciprocatory tension means, a tensioning gripper carried by said means, a spring means for urging said gripper into gripping position, a releasable locking means for retaining said gripper in the retracted position, a trigger positioned to be actuated by the band for releasing said gripper locking means, and said gripper, arranged to grip and pull the band during the outward movement of the reciprocatory tensioning means and to slide over the band during the inward movement thereof, and a lever for cooking said gripper.

10. In a band tying machine, a reciprocatory tensioning means, a band tying means, a master cam, and a drive means for the master cam operative for oscillating said cam for actuating the tensioning means and thereafter operative for rotating the cam through the remaining cycle of operation for actuating the tying means.

11. In a band tying machine a reciprocatory tensioning means, a band tying means, a master cam, an operating handle, a control means for initially connecting the operating handle with the master cam so as to oscillate the cam for actuating the tensioning means, and said control means being responsive to a predetermined tension of the band for connecting the operating handle with the master cam for rotating the cam through the remaining cycle of operation for actuating the tying means.

12. In a band tying. machine a reciprocatory tensioning means, a band tying means, a band severing means, a master cam, and a drive means for the master cam operative for oscillating said cam for actuating the tensioning means and thereafter operative for rotating the cam through the remaining cycle of operation for actuating the tying and severing means.

13. In a band tying machine a reciprocatory tensioning means, a band tying means, a band severing means, a master earn, an operating handle, a control means for initially connecting the operating handle with the master cam so as to oscillate the cam for actuating the tensioning means, and said control means being responsive 'to a predetermined tension of the band for. connecting the operating handle with the master cam for rotating the cam through the remaining cycle of operation for actuating the tying and severing means.

1 In a banding machine a reciprocatory tensio-ning means, a band tying means normally retained in the open position, means for moving the tying means from the open to the set position, a master cam, an oscillatory operating. handle, a control means actuated by the movement of the tying means from the open to the set position for operatively connecting the handle with the cam whereby upon oscillating the handle the cam will be oscillated to operatively reciprocate the tensioning means, and said control means being responsive to a predetermined tension of the band for connecting the handle with the cam whereby upon further oscillation of the handle the cam will be rotated through the remaining cycle of operation for actuating the tying means.

15. in a banding machine a reciprocatory tensioning means, band gripping means operative for maintaining the band under tension, a band tying means normally retained in a open position, means for moving the tying means from the open to the set position, a releasable locking means for locking the tying means in the set position, a master cam, an oscillatory operating handle, a control means actuated by the tying means while moving from its open to its set position for operatively connecting the handle with the master cam whereby upon oscillating the handle the cam will be oscillated to operatively reciprocate the tensioning means, and said control means being responsive to a predetermined tension of the band for connecting the handle with the cam whereby for each oscillation of the handle the cam will be rotated in the same direction for the remaining cycle of operation for actuating the tying means.

16. In a banding machine a reciprocatory tensiom'ng means, a band gripping means operative for maintaining the band under tension, a band tying means normally retained in an open position, means for moving the tying means from the open to the set position, a releasable locking means for retaining the tying means in the set position, a master cam, an oscillatory operating handle, a control means operative by the tying means while moving from the open to the set position. for operatively connecting the handle with the cam whereby by oscillating the handle the cam will be oscillated for operatively reciprocating the tensioning means said control means being responsive to a predetermined tension of the band for interrupting further tensioning of the band and for connecting the handle with the cam whereby for each oscillation of the handle the cam will be rotated in a forward direction for the remaining cycle of operation for actuating the tying means, and means for returning all of the parts to their initial starting position.

1'7. In a bending machine a reciprocatory tensioning. means, a band gripping means operative for maintaining the band under tension, a band tying means normally retained in an open position, means for moving the tying means from the open to the set position, a releasable locking means for retaining the tying means in the set position, a band severing means, an oscillatory operating handle, a control means operative by the tying means while moving from the open to the set position for operatively connecting the handle with the cam whereby by oscillating the handle the cam will be oscillated for operating the reciprocatory tensioning means, said control means being responsive to a predetermined tension of the band for interrupting further tensioning of the band and for connecting the handle with the cam whereby for each oscillation of the handle the cam will be rotated in a forward direction for the remaining cycle of operation for actuating the tying and severing means, and means for returning all of the parts to their initial starting position.

18. In a band tying machine a tying means including a pair of toggle levers, means for yieldingly retaining said toggle levers in an open position, means for swinging the toggle levers to a set position, and an escapement lock means for releasabiy locking the toggle levers in the set position. 19. In a band tying machine a tying means including a pair of toggle levers; means for yieldingly retaining said toggle levers in an open position, means for swinging the toggle levers to a set position, an escapement lock means opera tive for releasably retaining the toggle lever in the set position, meanslfor actuating the pair of toggle levers for forming the tie, and said escapement lock'means being actuated to a releasing position during the tie forming operation Whereby upon completion of the tie the yielding means may act to retgrn the toggle levers to their open position.

20. In a band tying machine a tying means including a movable member, means for yieldingiy retaining said movable member in an open position, means for; actuating said member into a set position, a lock'operative for locking said member in the set position, and means for releasing said lockingmeans when said member is moved beyond the set position.

21. In a band tying machine, a band tying means including apair of pivotally connected toggle *levers provided with tie forming jaws, toggle lever act iating means operable for actuating said jaws to form a tie in a band, and cam actuated means. associated with: the toggle levers and operable bythe' toggle lever; actuating means for swinging said levers during the tie" forming operation in order to maintain the tying jaws in alignment with the band.

' 22. In a band tying machine, a band tying means including a pair of pivotally connected toggle levers provided; with tie forming jaws; toggle lever actuating means operable for closing said jaws to form a'tie in a band, and cam actuated means operable by the toggle lever actuating means for swinging said levers during the tie forming operation to insure that each of said jaws will close in an equal amount upon the band. 23. In a band tying machine a band tying means including a pair of toggle levers provided with tie forming jaws, a tying cam, toggle leva actuating means operative by said cam for actuating said jaws for forming a tie in a band, a positioning cam and means actuated by said positioning cam for substantially maintaining the formingjaws in alignment with the hand during the tie forming. operation. 1 r

24. A fold back toggle for the tying means of a band tying machine including, a tying means provided with afpair of pivotally connected toggle levers, one of said levers having a lever arm of greater length than the other of said levers, and jointed toggle links interconnecting the lever arms of said levers adjacent the ends thereof and ar-- ranged so that when the lever arms are swung together the jointed portion of the toggle links will fold back upon the shorter of said toggle levers.

25. In a band tying machine a tying means in-:

cluding a pair of pivotally connected levers, a tie forming jaw provided in, the forward end of each lever, one of said levers having a rearwardly'extending lever arm of greater length than the other of said levers, jointed toggle iinks interconnecting the rearwardly extending lever arms of said levers adjacent the ends thereof, said jointed toggle links being arranged to fold back upon the shorter of 'said'lever arms topermit the tie forming jaws to be widelyfiseparatd to an open position, means for swinging the pivoted levers to a set or band engaging position and thereby swinging the jointed links to a toggle position between said lever arms, and means operative for actuating the toggle formed between said joint links and levers for actuating said tying jaws into a tie forming position.

265A tying means for a band tying machine including a bifurcated lever, a single lever journaled' between the bifurcations of the first said lever; a tie forming jaw provided in the forward end or each lever, said single lever having a rearwardly extending lever arm shorter than the lever arm of the bifurcated lever, a pair of first toggle links pivotally connected to and between the bifurcated portion of the bifurcated lever adjacent the rear end thereof, a pair of secnnd toggle links pivotally connected to opposite sides of the single toggle lever adjacent the rear end thereof, a toggle pin pivotally connecting the free ends of said first and second toggle links, said first and second toggle links being arranged to fold back upon the single lever to permit the tie forming jaws to be widely separated to an open position, means for swinging the single lever to a set or band 'fengaging position and thereby swinging the first and second links into a toggle position between said bifurcated and single levers, and means operative for actuating the toggle formed by the first and second links between the bifurcated and single levers for actuating the tying jaws into the tie forming position.

27."In a band tying machine, a reciprocatory tensioning means, a band tying means, a band severing means, a master cam, and a drive means for said master cam operative for oscillating said cam for actuating the tensioning means and thereafter operative for rotating the cam through the remaining cycle of its operation for actuating first the severing means and their the tying means.

28. In a band tying machine, a reciprocatory tensioning means, a band tying means, a band severing means, a master cam, an operative handle, a control means operative for initially connecting the operating handle with the master cam for oscillating the cam for actuating the tensioning means," and said control means being responsive to a predetermined tension of the band for connecting the operating handle with the master cam for rotating the cam through the remaining cycle of its operation for actuating first the severing and thenl'the tying meansf v 29. In a band tying machine, a band tensioning means, a band tying means, and a master cam operable by an oscillatory motion for actuating said tensioning means and by a rotary motion for actuating saidtying means.

LEO M. HARVEY. 

